blob: 0e1df08171aa3e919b49a75fd761c86bb43d4de4 [file] [log] [blame]
/*
* Copyright 2018 The Hafnium Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "hf/arch/cpu.h"
#include "hf/arch/vm/interrupts.h"
#include "hf/dlog.h"
#include "hf/std.h"
#include "vmapi/hf/call.h"
#include "vmapi/hf/spci.h"
#include "hftest.h"
#include "primary_with_secondary.h"
/*
* Secondary VM that sends messages in response to interrupts, and interrupts
* itself when it receives a message.
*/
static void irq(void)
{
uint32_t interrupt_id = hf_interrupt_get();
char buffer[] = "Got IRQ xx.";
int size = sizeof(buffer);
dlog("secondary IRQ %d from current\n", interrupt_id);
buffer[8] = '0' + interrupt_id / 10;
buffer[9] = '0' + interrupt_id % 10;
memcpy_s(SERVICE_SEND_BUFFER(), SPCI_MSG_PAYLOAD_MAX, buffer, size);
spci_msg_send(hf_vm_get_id(), HF_PRIMARY_VM_ID, size, 0);
dlog("secondary IRQ %d ended\n", interrupt_id);
}
/**
* Try to receive a message from the mailbox, blocking if necessary, and
* retrying if interrupted.
*/
struct spci_value mailbox_receive_retry()
{
struct spci_value received;
do {
received = spci_msg_wait();
} while (received.func == SPCI_ERROR_32 &&
received.arg2 == SPCI_INTERRUPTED);
return received;
}
TEST_SERVICE(interruptible)
{
spci_vm_id_t this_vm_id = hf_vm_get_id();
void *recv_buf = SERVICE_RECV_BUFFER();
exception_setup(irq, NULL);
hf_interrupt_enable(SELF_INTERRUPT_ID, true);
hf_interrupt_enable(EXTERNAL_INTERRUPT_ID_A, true);
hf_interrupt_enable(EXTERNAL_INTERRUPT_ID_B, true);
arch_irq_enable();
for (;;) {
const char ping_message[] = "Ping";
const char enable_message[] = "Enable interrupt C";
struct spci_value ret = mailbox_receive_retry();
ASSERT_EQ(ret.func, SPCI_MSG_SEND_32);
if (spci_msg_send_sender(ret) == HF_PRIMARY_VM_ID &&
spci_msg_send_size(ret) == sizeof(ping_message) &&
memcmp(recv_buf, ping_message, sizeof(ping_message)) == 0) {
/* Interrupt ourselves */
hf_interrupt_inject(this_vm_id, 0, SELF_INTERRUPT_ID);
} else if (spci_msg_send_sender(ret) == HF_PRIMARY_VM_ID &&
spci_msg_send_size(ret) == sizeof(enable_message) &&
memcmp(recv_buf, enable_message,
sizeof(enable_message)) == 0) {
/* Enable interrupt ID C. */
hf_interrupt_enable(EXTERNAL_INTERRUPT_ID_C, true);
} else {
dlog("Got unexpected message from VM %d, size %d.\n",
spci_msg_send_sender(ret),
spci_msg_send_size(ret));
FAIL("Unexpected message");
}
spci_rx_release();
}
}